Automatic cut-off for dispensing pumps



Jan. 7, 1941. C, s HAZARD 2,227,830

AUTOMATIC CUT-OFF FOR DISPENSING PUMPS Filed May 5, 1936 ATTORNEYS Patented Jim. 1, 1941 UNITED STATES PATENT OFFICE 2,227,830 AUTOMATIC CUT-OFF FOR DISPEN SIN G PUMPS Charles S.- Hazard Jersey tions wherein a eptune Meter New York, N. Y., assigner to Company, a corporation of New Application May 5, 1936, Serial N0. 77,959 4 Claims. (Cl. 2121-101) This invention relates to valve operated mechanism for dispensing pumps and similar construcvalve is actuated to terminate the flow of liquid upon delivery of a predetermined amount thereof.

The present invention is particularly applicable to devices having registering means for indicating both the volume and the cos t of the liquid dispensed and includes predetermining means for terminating the flow of delivered has either a given cost. One of the advantages vention resides in the which enables the unit of liquid when'the amount volume or a given pf the present inselective nature thereof measure employed in determining lthe operation of the valve to be varied at will. Deliveries can thus be made and the operation terminated when the amount of ,liquid dispensed has either a ume or a predetermined cost.

The construction employed predetermined volin any particular case may be varied considerably but as hereinafter described the invention may be employed in combination with registering mechanism to actuate the valve and close the same when the desired delivery has been m ade whereas other means are employed for actuating the valve to permit the delivery of liquid in initiating a dispensing operation or when the predetermining means is not employed.

One of the objects of the invention is to provide novel means for actuating a.

cut oil valve of a dispensing pump which means are selectively operable in response to the operation of alternative elements of a registering device. Another object of the invention is to provide means controlled by operations incidental to the dispensing of liquid from a controlling a cut on. valve.

These and other objects a dispensing pump for nd features of the invention Will-appear from the following description thereof in which reference is made to the accompanying figures of the drawing wherein:

Fig. 1 is a vertical sectional view of a portion of a dispensing pump and register having a typical form of the invention applied thereto, and

Fig. 2 is an elevation of a hose nozzle illustrating an alternative arrangement of certain elements of the construction of Fig. 1.

That form of the invention chosen for purposes of illustration is embodied in a dispensing pump having a casing 2 within which is housed a meter 4 which receives liquid from a suitable source,

such as a motor driven pump, through the conduit 6 and is provided with an outlet conduit 8 through which the liquid dispensed passes to a dispensing hose I0 provided with a nozzle I2. A cut off valve I4 is disposed lbetween the meter 4 and the nozzle I2 and as illustrated may be in the form of a spring loaded butterfly valve secured to a spindle I6 and operated by means of 5 an operating arm I8. The valve I4 normally tends to remain closed but is adapted to be opened before a dispensing operation is initiated by means of a lever 20 pivotally mounted on the housing 2 and provided with a portion extending 10 outwardly from the housing to serve as a support for the hose nozzle I2. 'I'he inner end of the lever 20 is provided with a downwardly extending rod 22 passing through an opening in the arm I3 and provided with a stop member 24 for engaging the 15 operating arm to depress the end thereof and open the valve when the outer end of pivoted lever 20 is raised in starting a dispensing operation. A link 2| is also connected to the inner end of lever 20 and is connected to a switch 23 to close the same and actuate a motordriven pump or other liquid now producing means.` The rod 22 is freely movable with respect to the operating arm I8 when the outer end of lever 20 is depressed and the inner end raised to actuate switch 23 for 25 stopping the delivery of liquid.

Upon rocking movement of the operating arm I 8 to open the valve I4, the inner end 26 of the arm is raised to the dotted line position shown, thereby raising a latch bar 28, the upper end of 30 which is provided with a recess 30. When raised the latch bar is engaged 'by a pivoted latch 32 carried by link 34 mounted on the register housing at 36. A projecting arm 38 is carried by the link 34 and extends into position above a tripping 35 member 4i! pivotally mounted at 42 and movable into raised position upon predetermined movement of an element of the register. The bar 28 and end 26 of the operating arm I8 are thus held in raised position by the latch 32 and the valve o is held open until released by movement of the latch carrying link 34 about its pivot in response to' operation of one or another of the elements of Ithe registering mechanism. When the pre- Y determining elements of the mechanism are not indicator 46 of the register being operable to indicate the cost of the liquid dispensed. whereas the lower indicator 48 ot the register is operable to indicate the volume of liquid dispensed. The indicators 46 and 48 are interconnected in any suitable way to cause the same Ito be driven in predetermined relation so that as the meter 4 is operated each of theindicators 46 and 48 is advanced by rotation in a clockwise direction. as shown in the drawing.

Each of the indicators is provided with a cam member 68 rotatable therewith and provided with two nodes 52 for engagement with a pin 54 on a tripping pawl 56 associated therewith. The pawl associated with Vthe cost indicator 48 is pivotally supported at 58 on a bell crank 68 supported at 62 on the register casing. A spring 64 secured to the pawl tends to hold the same in the position shown in full lines in the drawing when the bell crank 60 is in the position also indicated in full lines. The free end of the pawl 56 is then below the adjacent end of a tripping member 66 but out of engagement therewith. The upper tripping member 66 is held against downward movement by a stop pin 68 and is connected to the lower tripping member 48 by a link 10. n The pawl 56 associated with the lower indicator 48 is similarly supported at 12 by a bell crank 14, whereas the free end of the pawl extends into a position adjacent the lower tripping member.

Each oi the bell cranks 6I! and 14 is provided with a roller 16 bearing against a control slide 18 provided with recesses 80 and 82 in the surface thereof. The recesses 88 and 82 in the slide are spaced unequal distances from the rollers 16 on the bell cranks 60 and 14 and rest on the face of the slide when the slide is in the raised position shown. A spring 84 surrounding an operating rod 86 and extending between the lower end of slide 18 and the inner wall of the register housing urges the slide upwardly. However, the slide is movable downwardly against the action of spring 84 by means of a suitable selecting device 88 which is movable to any one cf a plurality of positions to select the element of the register to be used in determining the operation of the cut off valve I4. 'Ihe selector may be suitably constructed and arranged in any position or location convenient `to the operator. Thus, while the selector may be mounted on the hose nozzle as illustrated in Fig. 2, for example, it is shown in Fig. l as located on the meter casing 2.

When in the position illustrated in full lines in Fig. 1 the selector 88 serves. to maintain the tripping slide in its raised position in which the cut oi valve is not actuated by the registering mechanism. The valve i4 is then held open and the dispensing operations carried on independently thereof. When the selector is moved to a vertical position link 80 is moved to the right and bell crank 92 is rocked about its pivot drawing the operating rod 86 and control slide 18 downwardly against the action of spring 84. The roller 16 on bell crank 14 then moves into the recess 82 due to the action of the spring 64 rocking the bell crank 14 about its pivot and moving the tripping pawl 56 into a position in which the free end thereof lies beneath the end of tripping member 48. The positions of the parts when the pawl 56 is thus moved are indicated by the dotted line position of the upper pawl 55 which operates in the same manner.

Movement of the selector 88 to an extreme left hand position, as shown in the drawing, serves to depress the slide 18 further moving the roller 16 aaaasso on bell crank 'I4 out of the recess 82 and withdrawing the pawl 56 from beneath the tripping member 48. At the same time the roller 16 on the bell crank 60 enters the recess 88 and the pawlL 56 associated therewith is thus caused to move beneath the tripping member kassociated with the indicator 46 which indicatesvthe price o! the liquid dispensed.

'I'he selector 88 and slide 18 are thus caused to render either one of the number wheels and connected cams operative to actuate the tripping member associated therewith. The operation of the valve I4 to terminate delivery of liquid therefore takes place upon rotation of the cam 50 associated with whichever indicator is selected and upon movement of one of the nodes 52 thereon into engagement with the pin 54 on pawl 56 to raise the pawl and that tripping member beneath which the pawl has been moved by operation of the selector. The link connecting the tripping members 48 and 66 serves to raise both tripping members upon operation of either one, thereby insuring release of the latch 32 from bar 28 when either tripping member is actuated.

Since operation of valve I4 takes place automatically, and while the hand operated valve on hose nozzle I2 is held open by the operator, it is desirable to provide a check valve 94 in the dispensing hose or nozzle to prevent draining of the hose after ow of liquid has been cut off by the valve I4. Inaccurate delivery or loss to the patron due to relling of the hose in each operation is thus avoided even though the hand operated valve is held open after the dispensing operation is completed.

. In the operation of the construction described the hose I0 is removed from the supporting pivoted lever 28 and the outer end of the lever is raised depressing the inner end thereof so that switch 23 is operated to start'the motor operated pump for delivery of liquid. The operating arm I8 is also rocked to open the valve I4 and raise the rod 28 so that the latch 32 may enter the recess 3l) therein and hold the valve in opened position.

Thereafter in the delivery of liquid the meter 4 is actuated, driving the register through gears 44, causing the cost indicator 46 and the volume indicator 48 to be rotated. 'I'he cam members 60 associated with these indicators are rotated at the same time and the nodes 52 thereon engage the pins 64 on the tripping pawls 56, raising the same as the cam members rotate. However the pawls are free to move ,without actuating the tripping members 40 and 66 until they are moved by operation of the `selector 88 and control slide 18 to permit rocking of one or the other of the bell cranks 60 or 14 to project the tripping pawl associated therewith beneath the tripping member 48 or 66. If delivery of liquid is to be controlled only by the hand operated valve on the nozzle I2, the selector 88 is allowed to remain in the position illustrated in full lines and the slide 18 remains raised. .The cut oi valve then remains open or inoperative and may be held in this position throughout anyy number of dispensing operations, if desired.

When a patron wishes an exact amount, such as ilve gallons of gasoline, the delivery operation .is started as before, but when the indicator on the register passes a predetermined figure, such as four and one-half gallons, the operator moves the selector 86 to a vertical position, causing the slide 18 to be lowered to allow the roller 16 on bellcrank 14 to enter the recess 82, thereby causing the tripping pawl 58 associated therewith to be moved beneath the' tripping member 40 so that the next rotation of the node 52 on cam 50 intofposition to rase the tripping pa'wl will also cause the member 40 to be raised engaging the arm 38 on latch carrying link 34 tov rock the latter about its pivot 38 and withdraws\ e latch 32 from recess-30 in rod 28. The valve y,vfbeing of the spring loaded type, will then close automatically, terminating delivery-of liquid in ,re-A

` sponse to the movement of indicator 48 and upon delivery of the amountof liquid previously determined.

In the event the patron wishes to purchase an amount of gasoline or liquid having 'a given cost, say one dollar, the devicekis operated in the same way until the indicator 46 passes a predetermined amount, say ninety-five cents, and the selector is then moved tothe extreme right hand position, as seen in the drawing. The slide 18 is then moved to its lowermost position, the roller 'IE -on` bell crank 'I4' moving into and again out of recess 82 and the roller on bell crank 60 moving into recess 80. Thereafter upon rotation of a node 52 on the cam. associated with indicator Mi into engagement with the pin 54 on tripping pawl 58, the tripping member 66 isfraised. Link 10 connecting the members 88 and 40 causes the member I0 also to -be raised and the arm 38 and latch carrying link 34 .are thereby rotated to withdraw the latch 32 and permit closing of the valve Il. -The amount of liquid delivered is thus controlled by operation of the cost indicator and flow is terminated by a lpredetermined setting of the mechanism.

The selector of Fig. 2 is similar in construction and operation to that of Fig. 1 but is carried by the hose nozzle` I2 in a position convenient to the attendants hand as he operates the nozzle valve. A ilexible wire extends from the selector 88 along the outside of the hose l0 .to the control slide 18 of Fig. l and serves to move the same to the position selected for actuating the cut off valve releasing mechanism in the manner described in connection with the construction Y,of Fig. l.

As illustrated in Fig. 1, the nodes 52 on `cams 50 are ilxed to the cam and spaced to raise the trippingpawls associated therewith on rotation of the indicators to represent each half gallon or each live'cents. However, it will be obvious thatv i the scope of the invention. y

I claim: 1. In a liquid dispensing device having acutoi! valve and latch means `for retaining said valve in open position; the combination of a register comprising a pair of spaced, substantially parallel shafts adapted to actuate volume and cost indicators, respectively, each of said shafts being provided with a-cam having dwells of a length corresponding to a predetermined movement of the respective indicator, latch releasing means associated with the cams of each indicator, and selector means including a shiftable member, elements actuatable by said cams in accordance to movement of the dwells thereof, and means associated with said shiftable member `for selectively positioning `said elements for actuating said latch releasing means at a predetermined volume or cost registration.

2. In a liquid dispensing device having a cutoff valve and latch Vmeans for retaining said valve inopen position; the combination of a register comprising a pair of spaced, substantially parallel shafts adapted to actuate volume and cost indicators, respectively, each of saidshafts being provided with a cam having dwells of a length corresponding to a predetermined movement of the respective indicator, latch releasing means associated with the cams of eaclr indicator, and selector means including a shiftable member, an element adjacent each of said cams biased to eny gage the surface of said member, and the surface of said member being provided with irregularities for eifecting selective movement of said elements into operative position with respect to theirrespective cams and said latch releasing means for actuation ci; said latch releasing means at a predetermined volume or cost registration.

A3. In a liquid dispensing device Ahaving a cutoi valve and latch means for retaining said valve in open position; thecombination of a register having a pair of spaced shafts adapted to actuate `volume and cost indicators respectively, a cam carried by each of said shafts, latch releasing means located adjacent but out of reach of each of the cams, selector elements adapted to be engaged by said cams at predetermined positions of said volume and cost indicators, respectively, and a shiftable control member having parts adapted to effect selective movement of said' elements to positions whereby said latch releasing means are actuated to release said'cut-oi valve at predetermined volume or cost registrations.

4. In ,a liquid dispensing device having a cutoi valve and latch means for retaining said valve in open position; the combination of a register having a pair of spaced shafts adapted to actuate volume and cost indicators'respectively, a cam V carried by each of said shafts, said latch means including parts located adjacent but out of reach of each of the cams, a selector element for each cam, said cams being shaped to effect tripping movement of the selector elements at predetermined readings of their respective indicators, said selector elements being shiftable into position adjacent said latch means to trip same when said element is moved byits respective cam, and con- 

